Stevens-Johnson Syndrome in a Patient With Recent SARS-CoV-2 Infection and Ciprofloxacin Administration

Stevens-Johnson syndrome (SJS) is an acute, rare, and potentially life-threatening condition with high morbidity and mortality. It is characterized by a blistering rash and erosions with mucosal involvement, which depending on the extent of the skin area involved may be categorized as epidermal necrolysis, along with systemic symptoms. Symptoms are preceded by the administration of a newly introduced drug in almost 80% of cases and less commonly by infections in genetically predisposed individuals. We report a case of SJS in a female patient secondary to a recent SARS-CoV-2 infection and subsequent ciprofloxacin administration.


Introduction
Stevens-Johnson syndrome (SJS) is a rare entity.The syndrome can be subdivided into SJS in cases of involvement of body surface area (BSA) below 10%, SJS/toxic epidermal necrolysis (TEN) overlap in 10-30% BSA, or TEN when skin detachment extends beyond 30% BSA [1].SJS can be fatal, as mortality might reach 90% of cases.The presence of an underlying malignancy, older age, tachycardia, increased serum urea or hyperglycemia, or initial BSA involvement over 10% are bad prognostic factors [1].SJS has been noted to primarily affect women and the elderly [2].
SJS can be expressed days or even weeks after exposure to a potential trigger, which most frequently is a pharmaceutical substance.In most cases, the syndrome is a result of antiepileptic drug use such as carbamazepine, but it can also be brought about by other medicaments, for example, allopurinol, nonsteroidal anti-inflammatory drugs, and sulfonamides [3].More rarely, infections can be at fault.Such examples can be cytomegalovirus and mycoplasma infections [2].Several cases of SJS secondary to an infection with SARS-CoV-2 have also been recorded [4].

Case Presentation
A 73-year-old female patient came to our emergency department due to malaise and a painful bullous eruption affecting her thorax and upper and lower extremities and also involving the mucosal membranes of her mouth and anus, which developed five days after initiating a ciprofloxacin course.The antibiotic was prescribed to her by a pulmonologist due to a COVID-19 infection that was confirmed two weeks before her presentation to the emergency room.She initially visited a dermatologist because of the eruption, who advised her on a course of miconazole oral gel, methylprednisolone 16mg daily, and levocetirizine 5mg daily, with further deterioration of her clinical picture.
From her medical history, arterial hypertension and dyslipidemia were noted.She was being treated with amlodipine 5mg, flecainide 100mg, rosuvastatin 20mg, metoprolol 25mg, ramipril 5mg, and salicylic acid 100mg once daily.The patient was triple vaccinated with Comirnaty and her last vaccination was administered about six months prior to the current presentation.
Upon presentation, the patient appeared fatigued.Her blood pressure was 117/67 mmHg, she had a heart rate of 86 beats per minute, a temperature of 36.3°C, and an oxygen saturation of 95% on ambient air.An erythematous rash and blisters were noted on her trunk and upper and lower extremities bilaterally (Figures 1-3).The mucosal membranes of her mouth, nasal cavity, and anus were affected as well.The diagnosis was confirmed by a dermatology specialist, who did not request a skin biopsy.The extent of the lesions was estimated to cover a BSA of about 9%; all findings suggesting the diagnosis of SJS.Chest CT scan revealed subpleural nodules of about 3mm diameter in both upper lobes of the lungs as well as linear fibrous elements in the lingula and both lung bases, likely of a post-inflammatory etiology, as well as areas with bronchiectasis (Figure 4).

FIGURE 4: Chest CT of the patient showing a subpleural nodule
The patient was admitted to the internal medicine ward.After dermatologic consultation and confirmation of the diagnosis, she was put on a methylprednisolone 500mg intravenous regimen for three days, a proton pump inhibitor, and levocetirizine 5mg twice a day.Flecainide and metoprolol were continued, and the rest of her regimen was temporarily discontinued.She remained hemodynamically stable with a slightly improved clinical picture.On this basis, she was transferred to the dermatologic clinic of a tertiary hospital, where the presumptive diagnosis of SJS was accepted and she was further treated accordingly.Subsequently, the patient was discharged on a de-escalating oral prednisolone regimen.

Discussion
SJS and TEN are diagnoses with no universally accepted criteria.Histopathologic findings are neither diagnostic nor specific.The diagnosis of SJS is suggested when there is a history of drug exposure especially to drugs that have previously been associated with the syndrome in a patient with malaise and/or a prodromal febrile illness.SJS and TEN are also characterized by the presence of a painful, symmetric rash consisting of erythematous macules, targetoid lesions, or diffuse erythema rapidly progressing to vesicles and bullae, which usually first appear on the face and trunk.The epidermis demonstrates sloughing and necrosis.Painful oral, ocular, and genital lesions are also suggestive of the diagnosis.They usually affect women as well as the elderly and are immunocompromised [1].
The Naranjo scale of adverse drug reaction probability takes into account 10 parameters including previously documented similar reactions to a specific drug, previous exposure of the patient to a given drug, time of onset of reaction in relation to the administration of the drug, and alternative causes of the reaction [5].SJS in this patient appears to have occurred secondary to ciprofloxacin use.It is concluded that as there are reported cases of SJS after ciprofloxacin administration [6][7][8], symptoms were first noted five days after starting the regimen and improved upon withdrawal and no previous exposure to this particular antibiotic was documented.Also, no placebo was administered, the patient was not known to have previously taken any similar antibiotics, and the dosage of ciprofloxacin was not modified.
In addition, our patient's regimen contained medicaments that could potentially trigger SJS.Those can safely be excluded as a potential cause, as they were well tolerated for an extended amount of time.Also, no adjustment was done to her regular regimen, nor did she receive any other medications or supplements at any point in time.
As a conclusion, in the above-mentioned case there is an exposure to a drug that is known to potentially trigger SJS.However, based on the Algorithm of Drug Causality in Epidermal Necrolysis (ALDEN) (Table 1) [9] there is a weaker association between the development of SJS and ciprofloxacin administration as compared to some other medications (Table 2).However, given the available bibliography [4], SJS can also be triggered by SARS-CoV-2 infection.To be more precise, cases were described where SJS was confirmed up to 42 days after SARS-CoV-2 infection [4], while in this patient the symptoms of SJS appeared within about two weeks post-infection.

Conclusions
We presented a case of SJS with possible trigger either by the use of ciprofloxacin or the recent infection of the patient by SARS-CoV-2.Ciprofloxacin is a rare but established cause of SJS with an ALDEN score of 3. Recent publications point out a possible connection between infection or vaccination against SARS-CoV-2 and SJS.This case is of note because of the likelihood that SJS may have been triggered by the recent SARS-CoV-2 infection.

FIGURE 2 :FIGURE 3 :
FIGURE 2: Chest of the patient upon presentation showing erythematous macules, bullae, and hemorrhagic crusts or after the index day In case of previous reaction to the same drug, only changes for: Suggestive: +3: from 1 to 4 days Likely: +1: from 5 to 56 days Drug present in the body on index day Definite 0 Drug continued up to index day or stopped at a time point less than five times the elimination half-life a before the index day Doubtful −1 Drug stopped at a time point prior to the index day by more than five times the elimination half-life a but liver or kidney function alterations or suspected drug interactions b are present Excluded −3 Drug stopped at a time point prior to the index day by more than five times the elimination half-life a , without liver or kidney function alterations or suspected drug after use of similar drug c or other reaction with same drug Positive unspecific: 1 Other reaction after use of similar drug c of the "high-risk" list according to previous case-control studies Associated 2 Drug with definite but lower risk according to previous case-control studies Suspected 1 Several previous reports, ambiguous epidemiology results (drug "under surveillance"association from previous epidemiology study with sufficient number of exposed controls Intermediate score = total of all previous criteria Other cause Possible −1 Rank all drugs from highest to lowest intermediate score If at least one has an intermediate score >3, subtract 1 point from the score of each of the other drugs taken by the patient (another cause is more likely) Final score −12 to 10

a
Drug (or active metabolite) elimination half-life from serum and/or tissues (according to pharmacology textbooks), taking into account kidney function for drugs predominantly cleared by kidney and liver function for those with high hepatic clearance.b Suspected interaction was considered when more than five drugs were present in a patient's body at the same time.c Similar drug = same ATC code up to the fourth level (chemical subgroups).

TABLE 2 : Examples of medications associated with SJS and their ALDEN scores
ALDEN: Algorithm of Drug Causality in Epidermal Necrolysis